1. Department of Laboratory Medicine; Shinshu University Hospital; 3-1-1 Asahi Matsumoto, 390-8621 Japan
2. Department of Pathology; Shinshu University School of Medicine; 3-1-1 Asahi Matsumoto, 390-8621 Japan
3. Department of Diagnostic Pathology; Kyoto University Hospital; 54 Shogoin, Kawahara-cho Sakyo-ku Kyoto, 606-8507 Japan
4. Department of Pediatrics; Shinshu University Hospital; 3-1-1 Asahi Matsumoto, 390-8621 Japan
5. Department of Laboratory Sciences; Gunma University Graduate School of Health Sciences; 3-39-22 Showa-machi Maebashi, 371-8514 Japan